Do not ICE in type-alias-impl-trait with save-analysis

src/librustc_typeck/check/mod.rs

@@ -837,8 +837,11 @@ fn has_typeck_tables(tcx: TyCtxt<'_>, def_id: DefId) -> bool {
         return tcx.has_typeck_tables(outer_def_id);
     }
 
-    let id = tcx.hir().as_local_hir_id(def_id).unwrap();
-    primary_body_of(tcx, id).is_some()
+    if let Some(id) = tcx.hir().as_local_hir_id(def_id) {
+        primary_body_of(tcx, id).is_some()
+    } else {
+        false
+    }
 }
 
 fn used_trait_imports(tcx: TyCtxt<'_>, def_id: DefId) -> &DefIdSet {

src/test/ui/save-analysis/issue-68621.rs

@@ -0,0 +1,17 @@
+// compile-flags: -Zsave-analysis
+
+#![feature(type_alias_impl_trait)]
+
+trait Trait {}
+
+trait Service {
+    type Future: Trait;
+}
+
+struct Struct;
+
+impl Service for Struct {
+    type Future = impl Trait; //~ ERROR: could not find defining uses
+}
+
+fn main() {}

src/test/ui/save-analysis/issue-68621.stderr

@@ -0,0 +1,8 @@
+error: could not find defining uses
+  --> $DIR/issue-68621.rs:14:5
+   |
+LL |     type Future = impl Trait;
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+

src/test/ui/type-alias-impl-trait/issue-63279.rs

@@ -1,3 +1,5 @@
+// compile-flags: -Zsave-analysis
+
 #![feature(type_alias_impl_trait)]
 
 type Closure = impl FnOnce(); //~ ERROR: type mismatch resolving

src/test/ui/type-alias-impl-trait/issue-63279.stderr

@@ -1,5 +1,5 @@
-error[E0271]: type mismatch resolving `<[closure@$DIR/issue-63279.rs:6:5: 6:28] as std::ops::FnOnce<()>>::Output == ()`
-  --> $DIR/issue-63279.rs:3:1
+error[E0271]: type mismatch resolving `<[closure@$DIR/issue-63279.rs:8:5: 8:28] as std::ops::FnOnce<()>>::Output == ()`
+  --> $DIR/issue-63279.rs:5:1
    |
 LL | type Closure = impl FnOnce();
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected opaque type, found `()`

src/test/ui/type-alias-impl-trait/issue-65679-inst-opaque-ty-from-val-twice.rs

@@ -1,3 +1,4 @@
+// compile-flags: -Zsave-analysis
 // check-pass
 
 #![feature(type_alias_impl_trait)]